Delayed menstruation is usually not associated with vaccination against Neocon and may be caused by other factors. According to the Technical Guideline for Vaccination with Neoconavirus (First Edition), it can be understood that there are no toxic side effects of vaccination for other people over 18 years of age, unless they are allergic to the vaccine, have acute fever, have neurological diseases or are in pregnancy, which can be suspended. Delayed menstruation may be related to the patient’s irregular menstruation or to various influencing factors such as excessive mental stress, prolonged exertion, irregular work and rest, and cold environment. Patients should pay attention to the date of delayed menstruation. For example, women who are preparing for pregnancy should make calculations based on their personal physical condition and the time of intercourse, etc., and perform appropriate laboratory tests, etc., to diagnose the possibility of pregnancy. If there are no other obvious accompanying symptoms of delayed menstruation, you can observe it for a while, relax, try to keep your mood stable, keep your abdomen warm, avoid stimulating foods such as too cold and spicy foods, don’t overwork and wait for the arrival of menstruation. If there is a delay in menstruation and local reactions such as redness, swelling, hard knots and pain at the inoculation site of the patient, or accompanying symptoms such as fever, headache and weakness, go to a medical institution for diagnosis and treatment in time to avoid delaying the disease.